Exhaust gas from automatic spraying lines originates primarily from the spraying process (via robotic spray guns), the leveling zone, the constant-temperature drying zone, and leakage points in the automatic paint supply system. The organic substances in the exhaust are highly irritating and toxic; paint mist adhering to the skin can cause allergic reactions and inflammation, while organic emissions released into the atmosphere participate in photochemical reactions that form photochemical smog, thereby damaging the atmospheric environment. Furthermore, paint mist accumulation on precision components-such as nozzles and guide rails-compromises spraying accuracy and accelerates equipment wear. Additionally, organic solvents are flammable and explosive; if they accumulate to critical concentrations within the enclosed spraying booth, exposure to an electrical spark can easily trigger an explosion.
Given the characteristics of the exhaust-continuous emission, high paint mist concentration, moderate-to-high organic substance concentration, and complex composition-the following treatment process is employed: exhaust gas collected by an enclosed system passes sequentially through a cyclone spray scrubber, dry filtration equipment, primary activated carbon adsorption, and secondary activated carbon adsorption, followed by online monitoring, before finally being discharged through a dedicated stack in compliance with emission standards.
